DTC    C1413    Front Speed Sensor RH Output Malfunction

DTC    C1275    Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC)

DTC    C1276    Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC)

DTC    C1414    Front Speed Sensor LH Output Malfunction

for Preparation Click here


DESCRIPTION

Refer to DTCs C1401 and C1402 (Click here).

DTC Code
DTC Detection Condition
Trouble Area
C1413
C1414
Any of the following is detected:
  1. An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more.
  2. At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds.
  3. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.
  1. Front speed sensor RH/LH
  2. Speed sensor circuit
  3. Speed sensor rotor
  4. Brake actuator assembly (Skid control ECU)
C1275
C1276
Detected only during Test Mode.
  1. Front speed sensor RH/LH
  2. Speed sensor rotor

HINT:
  1. DTC C1413 and C1275 are for the front speed sensor RH.
  2. DTC C1414 and C1276 are for the front speed sensor LH.


WIRING DIAGRAM

Refer to DTCs C1401 and C1402 (Click here).

INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (Click here).

1.CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

  1. Using the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to the DTC (Click here).

    ABS/VSC/TRC 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    FR Speed Open
    		FR speed sensor open detection / ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal
    		-
    FL Speed Open
    		FL speed sensor open detection / ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal
    		-

    OK:
    There are no momentary interruptions.

    HINT:
    Perform the above inspection before removing the sensor and connector.



NG
Go to step 8
OK


2.READ VALUE USING INTELLIGENT TESTER (FRONT SPEED SENSOR)

  1. Turn the ignition switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    ABS/VSC/TRC (Skid Control ECU) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    FR Wheel Speed
    		FR wheel speed sensor reading/min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)
    		Actual wheel speed
    		Similar speed as indicated on speedometer
    FL Wheel Speed
    		FL wheel speed sensor reading/min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)
    		Actual wheel speed
    		Similar speed as indicated on speedometer

  1. Check that there is no difference between the speed value output from the speed sensor displayed on the intelligent tester and the speed value displayed on the speedometer when driving the vehicle.

    HINT:
    Factors that affect the indicated vehicle speed include tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart (Click here).

    OK:
    The speed value output from the speed sensor displayed on the intelligent tester is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).



NG
Go to step 5
OK


3.PERFORM TEST MODE (SIGNAL CHECK)

  1. Turn the ignition switch off.

  1. Perform the sensor check in the Test Mode procedure (Click here).

    OK:
    All Test Mode DTCs are cleared.



NG
Go to step 5
OK


4.RECONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is recorded (Click here).

    Result:

    Result
    		Proceed to
    DTCs (C1413 and C1414) are not output
    		A
    DTCs (C1413 and/or C1414) are output
    		B

    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (Click here).



B
Go to step 11
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (Click here)  

5.CHECK FRONT SPEED SENSOR INSTALLATION


    C144929E16

  1. Turn the ignition switch off.

  1. Check the speed sensor installation.

    OK:
    There is no clearance between the sensor and the front steering knuckle.
    The installation bolt is tightened properly.
    Torque:
    8.5 N*m (87 kgf*cm, 75 in.*lbf)



NG
INSTALL FRONT SPEED SENSOR CORRECTLY (Click here)
OK


6.INSPECT FRONT SPEED SENSOR TIP

  1. Remove the front speed sensor (Click here).

  1. Check the speed sensor tip.

    OK:
    No scratches, oil, or foreign matter on the sensor tip.

    NOTICE:
    Check the speed sensor signal after cleaning or replacement (Click here).



NG
CLEAN OR REPLACE FRONT SPEED SENSOR ROTOR
OK


7.INSPECT FRONT SPEED SENSOR ROTOR

  1. Remove the front speed sensor rotor (Click here).

  1. Check the speed sensor rotor.

    OK:
    No scratches, oil, or foreign matter on the rotors.

    NOTICE:
    Check the speed sensor signal after cleaning or replacement (Click here).

    HINT:
    If the front speed sensor rotor needs to be replaced, replace it together with the front drive outboard joint shaft assembly.



NG
CLEAN OR REPLACE FRONT SPEED SENSOR ROTOR
OK


8.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)


    C197056E01

  1. Install the front speed sensor and the front speed sensor rotor.

  1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

  1. Disconnect the skid control ECU connector and the front speed sensor connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance (for LHD):
    for RH:
    Tester Connection
    		Condition
    		Specified Condition
    A16-7 (FR+) - A11-2 (FR+)
    		Always
    		Below 1 Ω
    A16-7 (FR+) - Body ground
    		Always
    		10 kΩ or higher
    A16-6 (FR-) - A11-1 (FR-)
    		Always
    		Below 1 Ω
    A16-6 (FR-) - Body ground
    		Always
    		10 kΩ or higher
    for LH:
    Tester Connection
    		Condition
    		Specified Condition
    A16-19 (FL+) - A4-2 (FL+)
    		Always
    		Below 1 Ω
    A16-19 (FL+) - Body ground
    		Always
    		10 kΩ or higher
    A16-18 (FL-) - A4-1 (FL-)
    		Always
    		Below 1 Ω
    A16-18 (FL-) - Body ground
    		Always
    		10 kΩ or higher


    Standard Resistance (for RHD):
    for RH:
    Tester Connection
    		Condition
    		Specified Condition
    A17-7 (FR+) - A11-2 (FR+)
    		Always
    		Below 1 Ω
    A17-7 (FR+) - Body ground
    		Always
    		10 kΩ or higher
    A17-6 (FR-) - A11-1 (FR-)
    		Always
    		Below 1 Ω
    A17-6 (FR-) - Body ground
    		Always
    		10 kΩ or higher
    for LH:
    Tester Connection
    		Condition
    		Specified Condition
    A17-19 (FL+) - A4-2 (FL+)
    		Always
    		Below 1 Ω
    A17-19 (FL+) - Body ground
    		Always
    		10 kΩ or higher
    A17-18 (FL-) - A4-1 (FL-)
    		Always
    		Below 1 Ω
    A17-18 (FL-) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


9.INSPECT SKID CONTROL ECU (SENSOR INPUT)


    C197057E01

  1. Reconnect the skid control ECU connector.

  1. Turn the ignition switch to ON.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    for RH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A11-2 (FR+) - Body ground
    		Ignition switch ON
    		8 to 14 V
    for LH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A4-2 (FL+) - Body ground
    		Ignition switch ON
    		8 to 14 V

    NOTICE:
    Check the speed sensor signal after replacement (Click here).

    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (Click here).



NG
REPLACE BRAKE ACTUATOR ASSEMBLY (Click here)
OK


10.RECONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is recorded (Click here).

    Result:

    Result
    		Proceed to
    DTCs (C1413 and C1414) are not output
    		A
    DTCs (C1413 and/or C1414) are output
    		B

    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (Click here).



B
Go to step 11
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) 

11.REPLACE FRONT SPEED SENSOR

  1. Turn the ignition switch off.

  1. Replace the front speed sensor (Click here).

    NOTICE:
    Check the speed sensor signal after replacement (Click here).


NEXT


12.RECONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is recorded (Click here).

    Result:

    Result
    		Proceed to
    DTCs (C1413 and C1414) are not output
    		A
    DTCs (C1413 and/or C1414) are output
    		B

    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (Click here).



B
REPLACE FRONT SPEED SENSOR ROTOR
A

END